Re: IIe sound output

[mjmahon@aol.com (Michael J. Mahon)]

Ed wrote:

>If the cassette out is line level then you could easily rewrite programs 
>without source code by doing a search for the speaker address and 
>changing it to the cassette address using a sector editor.  Search for 
>$30 c0 (the speaker memory address in lo-high order) and change the $30 
>to a $20.  This works quite well for a lot of games according to many 
>things I've read.  Someone should check the circuit diagram and see how 
>well the impedence, current and voltage would do to drive a line level 
>input.

This will work for many programs, but be careful of accidental matches
to just two bytes.  It's probably a good idea to confirm the matches
by doing a local disassembly.

The cassette output is microphone-level (millivolts), so it would have
to go into a preamplified input (increasingly rare on todays equipment).

-michael

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